I am in Flagstaff Az, USA. I don't know about crystal violet but Prof States,
a mycologists in our area might know. I would suggest that you contact him throug through Northern Arizona University in Flagstaf Arizona. Now I have a
questons for you. I would like to know the scientific name for the Oak tree
that serves as host to the Black Perigord Truffle, tuber melanospermum.
In Arizona we have a scrub oak called Quercus emoryi. Is this tree, to
your knowlegde, similar? I am at 7500 feet in Flagstaff. At what
altitude does the BLack truffle exist (or does this matter)? Any in
formastion you can provide would be helpful.